Cupola



Sept. 5, 1933. w. P. BREWER ET AL CUPOLA Filed June 29. 1932 3 Sheets-Sheet l Sept. 5, 1933. w. P. BREWER El' AL CUPOLA Filed June 29. 952 '3 Sheets-Sheet 2 Sept. 5, 1933. w. P. BREWER ET AL CUPOLA d June 29. 1932 3 Sheets-Sheet 3 Patented Sept. 5, 1933 CUPOLA i `William P. Brewer, Rockdale, 'and John T.

Jones, Nashville, Tenn., assignors to Tennessee 'Products Corporation, 'Nashvill'e, Tenn., 'a corporation of Tennessee :Application June 29, 1932. Serial N'o. &19,848

8 Claims.

This 'invention 'relates 'to improvements in cupolas.

One of the main objects'of this invention "is to 'provide a new form of construction for devices of this nature ;in which, even at 'the high temperatures encountered therein,'therefractory lining will be protected against too rapid deterioration.

More specifically the `object 'of this invention is to provide in combination a cupola linedwith refraotory material 'having a water jacket in heat exchange relation "therewith and a `plurality of heat conducting members or 'cooling blocks associated with the lihing and 'the water jacket, and particularly in the neighborhood oi the tuyres for the purpose of protecting the lining and tuyres.

These 'and many other objects, as 'will appear from the following disclosure, are Secured 'by means of this invention.

This inventionresides 'substantially in the combination, Construction, arrangement, and-relative location of parte, all as will be 'described 'in con-- nection with the attached 'drawings Reierrng' to` the 'drawings- Figure 1 is a vertical cross-sectional View through the 'cupo'la oi `this invention;

Fig. 2 is a cross-sectional View taken on the line 2-2 `of Fig. 1;

Fig. '3 is an enlarged'vertical cross-sectional View through one of the tuyre ccnnections showing its association 'With the water leg;

Fig. '4 is a cross-sectional View of half of the cupola taken *on the line 4-4 of Fig. 1; and

Fig. '5 is a cross-sectional 'View taken on the line 5-5 of Fig. 1.

In the operation of retorts, cupolas, and furnaces, particularly in the treatment of some materials, it is necessary to' attain Very high temperatures within the retort, cupola, or urnace in order to reduce the materials to a molten state. In the operation of retorts and the like it is usual to employ some form of forced draft in order to attain the desired temperatures, with the result that the refractory lining employed therein is quickly eaten away. In additicn, the tuyres which project through the lining because of the high temperatures attained arerapidly destroyed. This, of course, requires frequent relining of the furnace and renewal of the tuyres, resulting in not only keeping the retort out of' use during repair but causing economic waste. The purpose of this invention is to provide a novel form of construction in which the heat in the refraotory lining, particularly in the combustion 'zone adjacent 'the tuyr'e's, `-is conducted away With sufficient rapidity 'to materially in'cr'ea'se 'the `'life 'of the lining and 'tuyr'es'withoutseriously iiterfering with the efficiency of th'e o eration of the retort.

The -construction by which `these objects are V -tory lining oi fire brick "and the like of a nature depending upon the types of material 'to b'trea'ted therein. surrounding th e'lower portion of the -cupola, and particularly in 'the neighborhood -of the combustior Zone, is an outer `ca-sing 7 which, in conjuncti'o'n with 'the lower portion 'of the *shell 3, provides a water jacket-or leg. At 8 is the inlet waterpipe'wh-ich delivers the cooling water to the jacket; which water *may -be withdrawn through the discharge connection 9. In *operation water 'continuously flows through the Water jacket in sufficient quantity 'to'abstract 'heat at the necessary rate to 'protect dhe lining 'while reducing to a--minimum the abstract-ich of useful 'heat from iihe'conibustion zone.

At 10 is a clea'nout manhole 'for the water jacket. Distributed around the cupolain ao cordan'ce 'with the 'usual 'practice are the tuyres `11 which 'are connected by 'means of 'vertical `pipes 13 With a 'common' gas -pipe '12 "through which air o'r other `suitable gases to support and aid combustior may be delivered. Each -of the connections 13 is provided With `a `-dam per Valve 14 by `means of which the amount of gas flow-ing to any tuyre *may be controlled. Projecting through the water 'jacket and the refractory 'lining 'are' 'a plurality *oi holl'ow "cooling blocks 6 fitted with water connect'io'ris '30, '31 to *provide circulation 'of water'preferably p'osi'tioriedin the lining so as to be in the neighborhood of the hottest points of the combustion zone. These cooling blocks 6 are also located with respect to the tuyres 11 so as to aid in absorbing heat from the Vioinity thereof to protect them. The tuyres are also equipped with coolers 40 made of bronze, copper,- brass or tuyre metal and `made of any suitable heat conducting material,

and the like.

such as cast iron, brass, copper, tuyre metal, It should be noted that they are also associated with the water jacket passing through same so that the heat conducted through them may be readily transferred in part to the water moving through the jacket to conduet it away. The relative position of the various parts will be readily apparent from Figs. 1, 2, 4 and 5. v

In Fig. 3 a detail is shown of the connection from the tuyre to the main air or gas conduit 12. The tuyre and the horizontal portion of the connecting pipe 13 are provided with the lugged rngs 16 and 17, respectively, which may be held together by means of nuts and bolts 19. A scaling ring 18 fts between the ends of the pipes to aid in iorming a good joint which may be readily taken apart. A sight or peep opening 20 is provided by means of which the interior of the cupola in the neighborhood of the combustion zone may be observed.

At the points where the tuyres and the inlet and outlet pipes 41 and 4:2 pass through the water jacket the surfaces may be Welded to provide a watertight joint. Instead of welding, if desired, the water jacket may be iormed to provide a closed container through which these pipes project in a manner similar to that shown in Fig. 1 at the points where the cooling members 6 pass through the water jacket.

The other details of Construction oi such a device have not been shown in the drawings i sincethis invention is not concern d with them.

refractory lining for said shell, a plurality of tuyeresmounted in said shell and lining so as to ,open into the interior of the retort, a water jacketsurrounding the shell in heat ex hange relation therewith and with the lining and tuyres, and a plurality of heat absorbing mernbers projecting through said shell, lining and jacket and exposed to the interior of the cupola.

2. A cupola as described comprsing an outer shell having a fire brick lining, a casing surrounding at least a portion of the shell and forming a water leg, a plurality of tuyres projecting throughthe water leg, shell and lining and opening into the interior of the retort, and

a plurality of heat absorbing members passing through the water leg, shell and lining.

3. In a cupola, the combination with a shell having a fire brick lining and a plurality of tuyres for supplying air or gas to the interier of the cupola, of a plurality of hollow cooling' blocks passing through the shell and lining and separated from but positioned in heat exchange relation to the tuyres.

41. A cupola as described comprising a shell, a refractory brick lining for the shell, means forming a Water jacket surrounding said shell, a plurality of water cooled tuyres opening into the interior of the cupola, a main air or gas supply connection, a plurality of branch connections from themain connection to the tuyres, and a plurality of water cooled heat conducting and radiating members passing through the shell and lining adjacent the t'uyres, said tuyres and members being positioned in heat exchange relation with the jacket.

5. A cupola as described comprising a shell, a fire brick lining for said shell, a plurality of tuyres passing through said shell and lining for supplying gas to the interior of the cupola, and

a plurality of heat conducting and radiating blocls passing through the shell and lining and positioned adjacent the tuyres but spaced therefrom so that the inner ends of the blocks are exposed to the interier of the cupola.

5.21 cupola as described comprising a steel eli, a fire brick lining for said shell, a plurality water cooled tuyres passing through said shell and lining for supplying air or gas to the interier of th cupola, a pluraiity of water cooled heat conducting and radiating members passing through the shell and cupola adjacent the tuyres so that the inner ends of the members are exposed to the interior of the cupola, and a Water jacket in heat exchange relation with said shell, tuyres and members.

'2. In a cupola the combination witha shell having a refractory lining and a plurality of tuyres extending to the interier thereof, oi a plurality of hollow heat absorbing blocks passing through the shell and lining adjacent the tuyres but spaced thereirom, and inlet and outlet water connections for the hollow heat absorbing biooks.

8. In having a refractory lining and a plurality of tuyres extending to the interier thereof, of a plurality of hollow heat iabsorbing members passing through the shell and lining adjacent the tuyres, inlet and outlet water connections for the hollow heat absorbing members, and a water jacket surrounding the tuyeres and members having connections for ci'culating a cooling fluid therethrough.

WILLIAM P.. BREWER. JOHN T. JONES.

a cupola the ccmbination with a shell 

